Snatch block



Sept.

c. B. JOHNSON SNATCH BLOCK Filed May 1945 (109d Johnson 25 22 6 2 :4 \H|it Patented Sept. 21, 1948 UNITED STATES PATE T OFFICE sNA'rcH BLOCK ICloyd B. J0hnson, Tulsa, Okla. Application May 14, 1945, Serial No.593,654

This invention relates to new and useful improvements in snatch blocks.

One object of the invention is to provide an improved snatch blockwherein a hook clevis is combined with a plate releasing means, wherebythe block may be readily opened to remove or replace the cable and alsowhereby, the hook may be swiveled to the clevis, thus permitting theblock to swing in opposite directions and the hook relieved of undueleverage or strain.

A further object of the invention is to provide an improved snatch blockhaving a simple and sturdy means for detachably securing one of its sideplates, whereby said plate may be quickly and simply released to permitthe plate to be swung to open and close the block.

A further object of the invention is to provide an improved snatch blockwherein one of thesi de plates, which is swingable, is held in place bya nut and bolt and said bolt is provided with means for limiting itswithdrawal when it is detached, whereby it is retained in the block whensaid plate is swung, and also whereby, it is not necessary to mutilateor specially form either of the plates or to provide auxiliary supports;the block involving fewer parts, having fewer parts and bein-gshorter inoverall length than other devices of this type.

A construction designed to carry out the invention will be. hereinafterdescribed together with other features of the invention.

The invention will be more readily understood from a reading of thefollowing specification and by reference to the accompanying drawings,wherein an example of the invention is shown, and wherein:

Fig. 1 is a perspective view of a snatch block constructed in accordancewith the invention, I

Fig. 2 is a side elevation showing the block in its open position,

Fig. 3 is a partial transverse sectional view taken on the line 33 ofFig. 1, and

Fig. 4 is a partial transverse sectional view taken on the line 4-4 ofFig. 2.

In the drawings, the numeral IIl designates a snatch block comprising apair of vertical side plates II and I2, each of which has a general pearshape, although they may be of any suitable shape. Between the enlargedends of the plates, a pulley I3 is journaled on an axle I4 mounted insaid plates. The particular mounting or journalling of the pulley isunimportant, and forms no particular part of the invention, therefore,it will not be described in detail.

Between the reduced ends of the plates, a clevis I5 is mounted to swingtransversely of the plates.

5 Claims. (0]. 254-193) I This clevis is an important feature of theinvention, and has a general 'U shape. The lower rounded portion of theclevis has a bor I6 extending inwardly from the plate I 2 and trans--.versely of the clevis, as is shown in Figs. 3 and 4. The bore I6terminates short of the opposite side of said clevis and has a counterbore I! extending through the clevis wall. A cross bolt I8 extendsthrough the bores I6 and I 1 and is provided with "an integral annularcollar I9 which has a snug sliding fit in the bor I6 for limiting thelongitudinal movement of the bolt. By observingFig. 3, it will be seenthat the clevis I5 is normally journalled on the collar I9 and bycontact with lo the bolt at the reduced bore II.

It will be observed that the bolt I8 is provided with screw threads 20and 2|, respectively, at its ends. Referring to Fig. 3, it will be seenthat the boltmust be initially inserted into the bore I6 20 from theright-hand side, and for this reason, the threads 20 are provided sothat a nut22 screwed onto the threads 20 may be employed to confine theside plate II and to secure the bolt in position. After the nut 22 isscrewed onto the threads a5 20, any suitable expedient is employed tofasten the nut so that in eifect it becomes a bolt head. and may be usedto rotate the bolt without loosening therefrom.

The plates are each formed with circular open ings 23, through which thebolt I8 may pass. A nut 24 is welded on the outer face of the plate I2around the opening 23 of said plate so as to receive the threads 2| ofthe bolt I8, as is shown in Fig. 3. It will be seen that when thethreads 2| are screwed into the nut 24, as shown in Fig. 3, the snatchblock will beclosed and retained in the position shown in Fig. 1. Whenit is desired to open the block, the nut 22 is rotated to unscrew thethreads 2| of the bolt I8 from the fixed nut 24, which will permit thebolt to be pulled to the left-hand until the collar I9 engages theendof'the counter bore I6, as is shown in Fig. 4, whereby the plate I2will be released and may be swung to the open I position shown in Fig.2. To prevent lateral displacement of the clevis I5 when the block isopen, as shown in Fig. 4, a lug 25 formed integral with the clevis,overhangs the reduced end of the plate I I and acts as a keeper. Whenthe block is opened, as shown in Fig. 2, it is obvious that a cable, notshown, may be placed in the block and looped around the pulley I3, orremoved therefrom, as is the usual practice in this type of blocks.

The clevis I5 is provided at its lower end with a transverse head orenlargement 26, which carries the lug 25, and also overhangs the reducedends of the plates I l and I2. Between the plates, the clevis isprovided with a transverse opening 21, in which the head 28 of the usualhook 29 is confined. This head surmounts a reduced shank 30, which isrotatably confined in the hanger 26. From the foregoing, it will be seenthat the hook 29 is free to rotate in the clevis and the clevis isfreely hinged pnfgthe bolt l8. "llh'e vertical axis of the hook is 'atright angles to the longitudinal axis of the bolt, and therefore, thehook is swiveled and may freely swing and turn in the block.

It is pointed out that by utilizing the bolt. 18 as a means of mountingthe clevis, as well as detachably securing the plate l2, a moresimple.

and compact arrangement is providedend it is thus possible to reduce theoverallden'g'tno'f the block. While the block has been illustratedrwiththe hook depending therefrom, it is obvious that lhq-hlee s aybe,invertedand he hook employed as, a ,su-ppor't for the ,block. en theblockgis opened, there 'ia'no danger ,o' either ,thQ boltpr the clevisdropping out orifb ecoming]. r'nisplaeed.

'Thebolt ,se'rve'sas: an axis pnWhich the clevis, swings, or uponfwhichth blo pro may sw n when; the hook an under a loafd, This arrangementeliminates undue leverage and strain,,on ,the .hookkproper,

as well as prolviding a, means whereby the device adjusts jitself; tovarious positions without twistarwtenth n iI'hejoregoing description ofthe invention is eggplanatqry thereof. and var ious chan fis in ,the"'ze, shape and materials as well asin the details of the, illustratedconstruction may 4 ,be .lrna'de, ithin the sCQDQO'f the appended claims,without de artingiro the spirit ofthe invention;

QWhat I,.'claim and fieslre ,m se'qure; by Letters Pat t I1,, .A, sna.tch block including-apairof side plates having a; pulley ,journalled.therebetween a, cross bailtpas'singtransversely through ,.the,,plates,' a clevis ,Jounnalled on ,the bolt between thel plates,

amt ed rq of e sla es f ee/ens n en of said b olt, the ,cl evisfi having reduced bore ,in whic t e o t ieab d a j n i dte and meanson thebolt disposed in the enlarged bo t 1l v t,-. i..m t ne isl di e merInent rof said bolt in, the clevis.

, 2,, A ,snatch-,lblockincluding a ,pair, of. side plates I? ayin a,. pu y i urnalled ,tner between,

a cros s, bo ,passingansverse at m th p a s' 1 .,-i urea 1ed thev bolzbetwee w te -nl tii ed opn s sthenl t sr e eivan re 2 f e d-.1 t.t e=e av a 3 1 duced bore in which the boltdsvs dable and an enlarged b ore,means 1 on the bolt: disposed 1n ;the

enl g d h rwtt e l ie li it hee in me em ntl f ea t nth c v aa d a keeNumber onath ,clevis overhjanging,the,,plate,;qpp,ositethe -mountedbetween the plates, a pulley mounted on the axle between the plates, atleast one of "said plates being rotatable around the axle, saidplateslhavirig opposed openings at their end portipns l spaced from ,thepulley, a cross-bolt having its ends extending through the plateopenings, afimember between the plates having a bore of larger diameterthan at least one of the plate openings throughwwhich the bolt extends,an;annular' enlargement on ItheQboIt aQQ Slidable'firi the bore ,of,saidmernber, said ienlar'gern 'ent' being less in lwidthlthan th spacebetweenthe in tes',.1 r-e taining in'eans secured on one of'the'platesfand detachably receiving one end of the emanateinembersecur'ed'hn the opposite end engaging the other plate. l

Asnatch-block. including side plates, an axle mounted between -.theplates,, a flmll ey mounted on ,the, axle between the plates, atlleast'ene', f said platesbein'g' rotatable around the axle, said 5l"ates"having' opposedbpenings at their end port'i'ons spaced from thepulley, va -cr s s- 'bolt hav;i;n-g its' erids extending throughtheplateiopenings, a meniber between the plates haym ab'qre of largerdiameter than. at ,least one of'the plate {on ngs through whichthe'bo'lt extends, an annular nlargement, surroundingand carried} Ythslidabl'intheboreofsaid member, en I e,-- rnentfbe g less in, width than,the space between the plates, a, nut secured to the, outer fiace of oneof,the,.platslatthe ,open'irig thereof, the olt haVihgScieW-threadsfat'fone end engagin nutfandanre 'r n the lother'endo .thel oltabutting'ltheflother plate whenJthefboltis, clawed iritdsaidflnut.

we werew- REFERENCES we r e ',I;he ;follow, in references are, oi,record. in file-x f; this patent:

.JP T P T S re ENI Name Date Hilnert =N,ov. 1,519 0 1 McKissick,JIme1,,l9-3!l Mc-Kissiclg et ,al Jan;T2, ;.lj9145 FOR G E TENI mQQWlfiWzDa e r '22 n new aqaae Nurnber

